Black Diamond Men's Baselayers

Frequently Asked Questions

• How does the Coefficient LT compare to the Solution 150 Merino for mountain activities?

  Coefficient LT uses Polartec® Power Grid™ (about 90% polyester/10% elastane) for fast-drying, next-to-skin warmth and high breathability during very sweaty, high-output efforts. Solution 150 Merino (NuYarn™ 78% merino/22% polyester) offers superior natural odor control and a lofted warmth-to-weight feel that works well on multi-day or variable-temperature outings; it’s best protected from heavy abrasion.
• How should I size Black Diamond men's baselayers like the Coefficient LT and Solution 150 for layering?

  Black Diamond baselayers are cut slim/athletic to sit close under mid and outer layers, so pick your usual size if you want a form-hugging fit for efficient moisture transfer. If you prefer more room to layer over the base or want less compression, consider sizing up one size and always check the brand’s sizing chart for torso length and inseam details.
• Which baselayer is best for high-output alpine pursuits like ski mountaineering or multipitch climbing?

  For very high-output alpine work where rapid moisture transport and quick drying matter, the synthetic Coefficient LT is often the better choice thanks to Polartec® Power Grid™’s wicking and venting. If you need multi-day odor control and superior thermoregulation on lower-abrasion routes or backcountry hut trips, the Solution 150 Merino is a strong option—just be mindful to protect it from rough rock contact.
• What materials and construction features give Black Diamond baselayers their performance?

  Models like the Coefficient LT use a Polartec® Power Grid™ polyester/elastane knit for lightweight loft, moisture management, and stretch, while the Solution 150 uses NuYarn™ merino blends that combine merino’s odor resistance and insulating loft with polyester durability. Flatlock seams, drop hems, thumb loops, and quarter/half zips on various pieces aid next-to-skin comfort, ventilation control, and secure layering under helmets and packs.
• How should I wash and care for Coefficient LT and Solution 150 baselayers to maintain performance?

  Machine wash on a gentle cycle with cold water and mild detergent, avoid fabric softeners and bleach, and dry on low heat or preferably flat to preserve loft and fit; high heat can damage synthetic elasticity and shrink merino. For merino items, reshape while damp and store dry to limit pilling and preserve the NuYarn™ loft over time.